The guys at HippoJuice got an interview with Futurama voice actor Billy West at South Florida Anime Supercon. Among other things, Billy speaks about a possible sixth season and says that there are talks with FOX about it. While information I got from a second source very close to the show a few weeks back did not rule out talks, I was told that there has not been any decision on the issue. So, no getting your hopes up too soon.